,,6 components: Cr 50mg/kg Cd 50mg/kg K 50mg/kg Pb 50mg/kg P 50mg/kg Hg 10mg/kg in HNO3 5% ,, ,,CRM, ISO 17034 and ISO 17025,, ,,Conservation 12 months. (6 months after opening),, ,,Ambient Temp.,, 1 * 50 mL